I built a custom keyboard with integrated trackball, but couldn't find an optical sensor for sale that fit my requirements. I needed support in ZMK, and low energy requirement since my keyboard was wireless. This PMW3610 fit the requirements!

You can use it as a reference when integrating the PMW3610 into your own projects.

• Complete Project Repository - Working ZMK firmware and build instructions

• PMW3610 Wiring Diagram - Pin connections and setup guide

Whether you're crafting a unique trackball keyboard, building a custom mouse, or adding motion sensing to a battery-powered project, you need something reliable and power-efficient. This board makes it simple to add high-quality tracking without the headaches.

• Widely supported sensor has great driver support on many platforms.

• Super low power consumption - perfect for battery-powered projects

• Ideal for custom mice, trackballs, and keyboard builds

• Clear labels on all pins - no confusing wiring diagrams needed

• Each board is hand-tested before shipping from Arizona, United States

• Sensor: PMW3610DM optical motion sensor

• Supply voltage: 3.3V

• Current consumption: Ultra-low power (ideal for battery projects)

• Communication: SPI interface

• Motion detection: Up to 1000 CPI

• Board dimensions: 23.5mm x 31.5mm

| PMW3610 Pin | nRF52840 Pin | Description |

|-------------|-----------------|-------------|

| SDIO | P1.00 | SPI MOSI/MISO (bidirectional data line) |

| SCLK | P0.24 | SPI clock signal |

| NCS | P0.22 | Chip select (active low) |

> | MOT | P0.20 | Motion interrupt pin (active low, pull-up) |

| GND | GND | Ground |

| VDD | VCC | Power supply (3.3V) |